3-D DC resistivity modeling and inversion using multi-resolution framework
Document identifier: oai:DiVA.org:ltu-77215
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10.1080/22020586.2019.12073116Keyword: Natural Sciences,
Earth and Related Environmental Sciences,
Geophysics,
Naturvetenskap,
Geovetenskap och miljövetenskap,
Geofysik,
Direct Current Resistivity method,
Multi-resolution grid,
Modeling,
Inversion,
Prospekteringsgeofysik,
Exploration GeophysicsPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: We discuss the implementation of multi-resolution framework to 3-D Direct Current (DC) problem. Commonly used staggered (SG) grid fixes the horizontal grid resolution for all depths. Thus, employing the fine horizontal resolution may lead to an over-discretised forward problem, subsequently affecting the performance of the inversion. We implemented a novel multi-resolution (MR) grid approach to the 3-D DC modeling and inversion problem, which allows adjustment of the horizontal resolution with depth. By using finer resolution for the near-surface regions, MR grid can ensure the modeling accuracy and describe the shallow features in the inversion model as well. The ability to use relatively coarser horizontal resolution for the deeper regions reduces the computation costs compare to the SG grid modeling. As a result, modeling and inversion can be accelerated several times by solving a smaller problem. Our grid resembles non-conformal rectangular grid, which commonly used in finite-elements modelling.
Authors
Jingyu Gao
Luleå tekniska universitet; Geovetenskap och miljöteknik
Other publications
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Maxim Smirnov
Luleå tekniska universitet; Geovetenskap och miljöteknik
Other publications
>>
Maria Smirnova
University of Cologne, Köln, Germany
Other publications
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Gary Egbert
Oregon State University, Corvallis, US
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>>
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identifier: oai:DiVA.org:ltu-77215
datestamp: 2021-04-19T12:49:10Z
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recordCreationDate: 2019-12-18
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http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77215
10.1080/22020586.2019.12073116
titleInfo:
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lang: eng
title: 3-D DC resistivity modeling and inversion using multi-resolution framework
abstract: We discuss the implementation of multi-resolution framework to 3-D Direct Current (DC) problem. Commonly used staggered (SG) grid fixes the horizontal grid resolution for all depths. Thus employing the fine horizontal resolution may lead to an over-discretised forward problem subsequently affecting the performance of the inversion. We implemented a novel multi-resolution (MR) grid approach to the 3-D DC modeling and inversion problem which allows adjustment of the horizontal resolution with depth. By using finer resolution for the near-surface regions MR grid can ensure the modeling accuracy and describe the shallow features in the inversion model as well. The ability to use relatively coarser horizontal resolution for the deeper regions reduces the computation costs compare to the SG grid modeling. As a result modeling and inversion can be accelerated several times by solving a smaller problem. Our grid resembles non-conformal rectangular grid which commonly used in finite-elements modelling.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Natural Sciences
Earth and Related Environmental Sciences
Geophysics
@attributes:
lang: swe
authority: uka.se
topic:
Naturvetenskap
Geovetenskap och miljövetenskap
Geofysik
@attributes:
lang: eng
topic: Direct Current Resistivity method
@attributes:
lang: eng
topic: multi-resolution grid
@attributes:
lang: eng
topic: modeling
@attributes:
lang: eng
topic: inversion
@attributes:
lang: swe
authority: ltu
topic: Prospekteringsgeofysik
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Exploration Geophysics
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
4
Godkänd;2020;Nivå 0;2020-04-22 (alebob);Konferensartikel i tidskrift
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Gao
Jingyu
1992-
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Luleå tekniska universitet
Geovetenskap och miljöteknik
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Maxim
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Luleå tekniska universitet
Geovetenskap och miljöteknik
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Maria
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affiliation: University of Cologne Köln Germany
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Egbert
Gary
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affiliation: Oregon State University Corvallis US
originInfo:
dateIssued: 2019
publisher: Taylor & Francis
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title: ASEG Extended Abstracts
identifier: 2202-0586
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number: 1
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form: print
typeOfResource: text